a)
For some services, only the uplink frequencies are included.
b)
The carrier is modulated using a 50% duty cycle square wave signal.
c)
As an alternative to FM modulation, 50% pulse modulation at 18 Hz may be used because, while it does not
represent actual modulation, it would be worst case.
Field strengths from fixed RF transmitters, as determined by an electromagnetic
site survey,
d
should be less than the compliance level in each frequency range.
e
Interference may occur in the vicinity of equipment marked with the following
symbol:
d
Field strengths from fixed transmitters, such as base stations for radio (mobile/wireless) telephones and
land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted
theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in the location in which
the Sensor is used exceeds the applicable RF compliance level above, the Sensor should be observed to
verify normal operation. If abnormal performance is observed, additional measures may be necessary,
such as re-orientating or relocating the Sensor.
e
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 10 V/m.
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